Alert archive / Ohio / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 349
The Storm Prediction Center issued this severe thunderstorm watch at May 23, 2011, 8:31 PM EDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2011, 8:31 PM EDT (00:31 UTC)
- Expired
- May 23, 2011, 11:16 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 75 counties
Bath County, KY, Boyd County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Greenup County, KY, Lawrence County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Powell County, KY, Rowan County, KY, Ashtabula County, OH, Athens County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Gallia County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Lake County, OH, Lawrence County, OH, Mahoning County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Portage County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Crawford County, PA, Erie County, PA, Forest County, PA, Greene County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Brooke County, WV, Cabell County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Marshall County, WV, Mason County, WV, Ohio County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wayne County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 89 km from the middle of the area, began a volume at 00:32 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:38 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula | 52 min |
| May 23, 8:41 PM EDT | Severe Thunderstorm Warning | RLX | Boyd, Carter, Greenup | 64 min |
| May 23, 8:43 PM EDT | Severe Thunderstorm Warning | CLE | Trumbull | 33 min |
| May 23, 8:44 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 46 min |
| May 23, 8:50 PM EDT | Severe Thunderstorm Warning | RLX | Perry | 55 min |
| May 23, 8:51 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 39 min |
| May 23, 8:57 PM EDT | Severe Thunderstorm Warning | JKL | Breathitt, Knott, Magoffin, Morgan, Wolfe | 33 min |
| May 23, 9:07 PM EDT | Tornado Warning | PBZ | Mercer | 38 min |
| May 23, 9:12 PM EDT | Severe Thunderstorm Warning | JKL | Elliott, Floyd, Johnson, Magoffin, Morgan | 48 min |
| May 23, 9:18 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Muskingum, Noble, Tuscarawas | 57 min |
| May 23, 9:32 PM EDT | Severe Thunderstorm Warning | RLX | Boyd, Carter, Lawrence | 58 min |
| May 23, 9:36 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more | 54 min |
| May 23, 9:37 PM EDT | Severe Thunderstorm Warning | CLE | Holmes, Wayne | 38 min |
| May 23, 9:46 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga, Geauga | 38 min |
| May 23, 10:04 PM EDT | Severe Thunderstorm Warning | CLE | Portage, Trumbull | 56 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 0.5 hours before the alert went out and 96 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 369 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 340 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:47 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Butler, Caldwell, Christian and 21 more | 58 min |
| May 24, 6:24 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bell, Casey, Clay and 18 more | 96 min |
| May 24, 7:01 AM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Bell, Breathitt, Casey and 38 more | 8 hr |
| May 24, 8:34 AM EDT | Mesoscale Discussion | SPC | Bell, Breathitt, Clay, Floyd, Harlan, Jackson and 13 more | 116 min |
| May 24, 12:55 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bell, Clay, Clinton and 15 more | 65 min |
| May 24, 1:57 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Bell, Clay, Clinton and 14 more | 6 hr |
| May 24, 3:33 PM EDT | Mesoscale Discussion | SPC | Harlan | 87 min |
| May 24, 4:27 PM EDT | Mesoscale Discussion | SPC | Bell, Harlan, Letcher, Whitley | 63 min |
| May 23, 8:07 PM EDT | Mesoscale Discussion | SPC | Ashtabula, Carroll, Columbiana, Cuyahoga, Geauga, Holmes and 9 more | 83 min |
| May 24, 2:11 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Crawford, Hancock, Hardin and 17 more | 94 min |
| May 24, 1:34 PM EDT | Mesoscale Discussion | SPC | Berks, Bradford, Bucks, Carbon, Columbia, Lackawanna and 11 more | 116 min |
| May 24, 10:00 AM EDT | Severe Thunderstorm Watch | SPC | Greenbrier, Mercer, Monroe, Summers | 7 hr |
| May 24, 7:33 PM EDT | Mesoscale Discussion | SPC | McDowell | 57 min |
Nearby
Severe Thunderstorm Watches in Ohio, 2011Severe Thunderstorm Watches in West Virginia, 2011Severe Thunderstorm Watches in Kentucky, 2011Every severe thunderstorm watch in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.